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LOANS RECEIVABLE - Loans receivable, excluding loans held for sale (Details) - USD ($) $ in Thousands		Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 881,316		$ 876,116
Less: Allowance for loan losses		11,436	$ 11,442	11,457	$ 11,513	$ 11,349	$ 10,766
Loans receivable, net		869,880		864,659
Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for loan losses		150
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less: Allowance for loan losses		1,000
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		792,671		783,707
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		167,782		162,796
Less: Allowance for loan losses		2,051	2,113	1,808	1,858	1,799	1,668
Commercial Real Estate Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		471,571		461,432
Less: Allowance for loan losses		5,038	4,889	5,053	5,361	5,139	4,914
Commercial Real Estate Portfolio Segment | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		14,166		17,027
Less: Allowance for loan losses		219	244	254	237	258	220
Commercial Real Estate Portfolio Segment | Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		55,978		51,570
Less: Allowance for loan losses		779	699	728	696	781	822
Commercial Real Estate Portfolio Segment | Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		83,174		90,882
Less: Allowance for loan losses		1,381	1,506	1,457	1,007	855	618
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		88,645		92,409
Less: Allowance for loan losses		1,347	$ 1,346	1,447	$ 1,641	$ 1,788	$ 1,809
Consumer | Real estate one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		82,578		84,053
Consumer | Other installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	[1]	$ 6,067		$ 8,356
[1] Includes purchased automobile loans totaling $3.4 million and $5.8 million at September 30, 2019 and March 31, 2019, respectively.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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